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| 51. | posterior orbit |
| 后眼眶 |
|
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| 52. | reference orbit |
| 参考轨道 |
|
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| 53. | parallactic orbit |
| 视差轨道 |
|
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| 54. | rectilinear orbit |
| 直线轨道 |
|
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| 55. | penetrating orbit |
| 贯穿轨道 |
|
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| 56. | unperturbed orbit |
| 未扰动轨道 |
|
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| 57. | hyperbolic orbit |
| 双曲线轨道 |
|
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| 58. | elliptical orbit |
| 椭圆轨道 |
|
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| 59. | photometric orbit |
| 光度轨道 -食双星 |
|
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| 60. | spectrographic orbit |
| 摄谱轨道 |
|
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